推广稻田养萍后,田间的水温、泥温会降低以至影响水稻的生育和产量吗?回答是否定的。这是因为:①气象上讲的日照时数,是指太阳在某地实际照射地面的时数。水面的绿萍,虽然阻挡了太阳的辐射进入水层,但绿萍本身要吸收一部分太阳辐射能量,能弥补一部分由于阻挡太阳辐射进入水层的热量损失。另一方面,水面增加 After popularizing the rice paddies, the water temperature in the fields and the temperature of the mud will be reduced to affect the fertility and yield of rice. The answer is no. This is because: ① weather sunshine hours, refers to the actual exposure of the sun in the ground some hours. Although the water surface of the Lupin, blocking the sun’s radiation into the water layer, but Lvping itself to absorb part of the solar radiation energy, can make up for part of the block due to solar radiation into the water layer heat loss. On the other hand, the water surface increases